[xmlunit/xmlunit] aad6f4: make JAXB dependency optional instead of test scop...

[Stefan B. <no...@gi...>]

  Branch: refs/heads/master
  Home:   https://github.com/xmlunit/xmlunit
  Commit: aad6f42ab98391773f38b3905a6195d1b28155bc
      https://github.com/xmlunit/xmlunit/commit/aad6f42ab98391773f38b3905a6195d1b28155bc
  Author: Stefan Bodewig <ste...@fr...>
  Date:   2019-07-27 (Sat, 27 Jul 2019)

  Changed paths:
    M README.md
    M RELEASE_NOTES.md
    M xmlunit-core/pom.xml

  Log Message:
  -----------
  make JAXB dependency optional instead of test scope for Java9+

closes #162